[Bug fortran/58307] Bogus error 'Function requires an argument list'

["burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58307

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |burnus at gcc dot gnu.org

--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to janus from comment #0)
> produces (with 4.7, 4.8 and trunk) the error message
> 
>   real(point) :: this
>             1
> Error: Function 'point' requires an argument list at (1)
> 
> which is misleading, since 'point' is obviously not a function.


Well, in this case it isn't. However, it is permitted to have a function with
the same generic name as a derived type ("constructors"). That wouldn't help in
this case as one needs a constant/initialization expression, but it explains
the error message.

(Internally, gfortran generates a generic function symbol under the
derived-type name - and links the hidden symbol with the derived type to it.)

As always, providing a good error message in all cases is difficult - the other
error message is also not that friendly as earlier gfortrans show.

pathf95/crayftn have:
  This use of derived type "POINT" is not valid.
g95 has:
  Error: Syntax error in structure constructor at (1)
pgf95 has:
  PGF90-S-0087-Non-constant expression where constant expression required 
  PGF90-S-0081-Illegal selector - KIND parameter has unknown value for data
type
ifort has:
  A kind type parameter must be a compile-time constant.